Re: (ET) Deal on Batteries

["David Roden" <etpost drmm net>]

On 28 Feb 2011 at 11:12, Chapin, Timothy wrote:

> Only 44 lbs of lead.  They didn't quote amp hours, but with the lower
> weight, I don't think the batts aren't 220ah. 

They gave the reserve capacity (oddly labeled ca rather that rc) as 100 
min 
at 75 amps and 375 min at 25 amps.  From that we can calculate Peukert's 
exponent as 1.20 (about typical for a flooded golf car battery).  

With that information we can calculate the capacity at the 20h rate as 
190ah.  That's definitely not equivalent to a 220ah battery (and the rc is 
low too), but it's probably ample for many folks' use.


David Roden - Akron, Ohio, USA

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